Textual Amendments
to include modified tyre types for EC type-approvals pursuant to Annex II and/or
to include additional tyre size designations and/or amended brand names or manufacturer's trade descriptions and/or tread patterns for EC type-approvals pursuant to Annex V.
Textual Amendments
The tyre bearing the EC type-approval mark shown above is a commercial vehicle tyre (00) satisfying the EC requirements (e), for which the EC type-approval mark has been granted in Ireland (24) under the number 479 pursuant to Annex II and in Italy (3) under the number 687-s pursuant to Annex V.
The numbers ‘ 479 ’ and ‘ 687 ’ (EC-mark type-approval numbers) and the number ‘ 24 ’ and the digit ‘ 3 ’ (letters and number of the Member States which granted the EC approval) are for guidance only. U.K.
The approval numbers must be placed close to the rectangle and may be above, below, to the left or to the right. The characters of the approval number must all be on the same side of the ‘ e ’ and face in the same direction.
Textual Amendments
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
:
normal road-use tyre,
:
special-use tyre, e.g. tyre for mixed use (both on and off the road) and at restricted speed,
snow tyre,
temporary-use spare tyre;
The exhaustive range of values is shown in the table below: | |
‘d’Nominal rim diameter (the symbol) | |
---|---|
Expressed in inches(code) | Equivalence in mm(reference section 6.1.2.1) |
10 | 254 |
11 | 279 |
12 | 305 |
13 | 330 |
14 | 356 |
15 | 381 |
16 | 406 |
17 | 432 |
18 | 457 |
19 | 483 |
20 | 508 |
21 | 533 |
22 | 559 |
24 | 610 |
25 | 635 |
14,5 | 368 |
16,5 | 419 |
17,5 | 445 |
19,5 | 495 |
20,5 | 521 |
22,5 | 572 |
24,5 | 622 |
Speed category symbol | Corresponding speed(km/h) |
---|---|
F | 80 |
G | 90 |
J | 100 |
K | 110 |
L | 120 |
M | 130 |
N | 140 |
P | 150 |
Q | 160 |
R | 170 |
S | 180 |
T | 190 |
U | 200 |
H | 210 |
V | 240 |
Maximum speed(km/h) | Load(%) |
---|---|
215 | 98,5 |
220 | 97 |
225 | 95,5 |
230 | 94 |
235 | 92,5 |
240 | 91 |
for intermediate maximum speeds linear interpolations of the maximum load rating are allowed;
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
S = S1 + K (A−A1),
where:
=
the ‘nominal section width’ in mm as shown on the sidewall of the tyre in the tyre-size designation as prescribed;
=
the width (expressed in mm) of the measuring rim, as shown by the manufacturer in the descriptive note, (see section 6.11 of Annex I, Appendix 1);
=
the width (expressed in mm) of the theoretical rim; it is taken to equal S1 multiplied by the factor x as specified by the tyre manufacturer (see section 6.15 of Annex I, Appendix 1); and K is taken to equal 0.4.
D = d + 0,02H
where:
D is the outer diameter expressed in mm,
d is the conventional number defined in section 2.17.1.3, expressed in mm,
H is the nominal section heigth in mm and is equal to S1 × 0,01 Ra;
where:
Ra is the nominal aspect ratio,
all as shown on the sidewall of the tyre in the tyre-size designation in conformity with the requirements of section 3.
The actual dimensions of tyres are measured as prescribed in Appendix 6.
The outer diameter of a tyre must not be outside the values Dmin and Dmax obtained from the following formulae:
=
d + (2H × a)
=
d + (2H × b)
H = 0,5 (D — d) — (for references see section 6.1.2.2).
‘H’ and ‘d’ are as defined in section 6.1.2.1.
Category of use | Passenger car tyres | Commercial vehicle tyres | ||
---|---|---|---|---|
Radial | Bias | Radial | Bias | |
Normal | 1,04 | 1,08 | 1,04 | 1,07 |
Special | — | — | 1,06 | 1,09 |
Snow | 1,04 | 1,08 | 1,04 | 1,07 |
Temporary-use | 1,04 | 1,08 | — | — |
LI | Maximum |
---|---|
0 | 45 |
1 | 46,2 |
2 | 47,5 |
3 | 48,7 |
4 | 50 |
5 | 51,5 |
6 | 53 |
7 | 54,5 |
8 | 56 |
9 | 58 |
10 | 60 |
11 | 61,5 |
12 | 63 |
13 | 65 |
14 | 67 |
15 | 69 |
16 | 71 |
17 | 73 |
18 | 75 |
19 | 77,5 |
20 | 80 |
21 | 82,5 |
22 | 85 |
23 | 87,5 |
24 | 90 |
25 | 92,5 |
26 | 95 |
27 | 97,5 |
28 | 100 |
29 | 103 |
30 | 106 |
31 | 109 |
32 | 112 |
33 | 115 |
34 | 118 |
35 | 121 |
36 | 125 |
37 | 128 |
38 | 132 |
39 | 136 |
40 | 140 |
41 | 145 |
42 | 150 |
43 | 155 |
44 | 160 |
45 | 165 |
46 | 170 |
47 | 175 |
48 | 180 |
49 | 185 |
50 | 190 |
51 | 195 |
52 | 200 |
53 | 206 |
54 | 212 |
55 | 218 |
56 | 224 |
57 | 230 |
58 | 236 |
59 | 240 |
60 | 250 |
61 | 257 |
62 | 265 |
63 | 272 |
64 | 280 |
65 | 290 |
66 | 300 |
67 | 307 |
68 | 315 |
69 | 325 |
70 | 335 |
71 | 345 |
72 | 355 |
73 | 365 |
74 | 375 |
75 | 387 |
76 | 400 |
77 | 412 |
78 | 425 |
79 | 437 |
80 | 450 |
81 | 462 |
82 | 475 |
83 | 487 |
84 | 500 |
85 | 515 |
86 | 530 |
87 | 545 |
88 | 560 |
89 | 580 |
90 | 600 |
91 | 615 |
92 | 630 |
93 | 650 |
94 | 670 |
95 | 690 |
96 | 710 |
97 | 730 |
98 | 750 |
99 | 775 |
100 | 800 |
101 | 825 |
102 | 850 |
103 | 875 |
104 | 900 |
105 | 925 |
106 | 950 |
107 | 975 |
108 | 1 000 |
109 | 1 030 |
110 | 1 060 |
111 | 1 090 |
112 | 1 120 |
113 | 1 150 |
114 | 1 180 |
115 | 1 215 |
116 | 1 250 |
117 | 1 285 |
118 | 1 320 |
119 | 1 360 |
120 | 1 400 |
121 | 1 450 |
122 | 1 500 |
123 | 1 550 |
124 | 1 600 |
125 | 1 650 |
126 | 1 700 |
127 | 1 750 |
128 | 1 800 |
129 | 1 850 |
130 | 1 900 |
131 | 1 950 |
132 | 2 000 |
133 | 2 060 |
134 | 2 120 |
135 | 2 180 |
136 | 2 240 |
137 | 2 300 |
138 | 2 360 |
139 | 2 430 |
140 | 2 500 |
141 | 2 575 |
142 | 2 650 |
143 | 2 725 |
144 | 2 800 |
145 | 2 900 |
146 | 3 000 |
147 | 3 075 |
148 | 3 150 |
149 | 3 250 |
150 | 3 350 |
151 | 3 450 |
152 | 3 550 |
153 | 3 650 |
154 | 3 750 |
155 | 3 875 |
156 | 4 000 |
157 | 4 125 |
158 | 4 250 |
159 | 4 375 |
160 | 4 500 |
161 | 4 625 |
162 | 4 750 |
163 | 4 875 |
164 | 5 000 |
165 | 5 150 |
166 | 5 300 |
167 | 5 450 |
168 | 5 600 |
169 | 5 800 |
170 | 6 000 |
171 | 6 150 |
172 | 6 300 |
173 | 6 500 |
174 | 6 700 |
175 | 6 900 |
176 | 7 100 |
177 | 7 300 |
178 | 7 500 |
179 | 7 750 |
180 | 8 000 |
181 | 8 250 |
182 | 8 500 |
183 | 8 750 |
184 | 9 000 |
185 | 9 250 |
186 | 9 500 |
187 | 9 750 |
188 | 10 000 |
189 | 10 300 |
190 | 10 600 |
191 | 10 900 |
192 | 11 200 |
193 | 11 500 |
194 | 11 800 |
195 | 12 150 |
196 | 12 500 |
197 | 12 850 |
198 | 13 200 |
199 | 13 600 |
200 | 14 000 |
These markings define a tyre:
having a nominal section width of 185,
having a nominal aspect ratio of 70,
of radial-ply structure (R),
having a nominal rim diameter of 14,
having a load capacity of 580 kg, corresponding to load index 89 in Appendix 2,
classified in the speed category T (maximum speed 190 km/h),
for fitting without an inner tube (‘tubeless’),
of ‘snow’ type,
manufactured during the twenty-fifth week of the year 1993.
The positioning and order of the markings constituting the tyre designation are as follows:
the size designation, comprising the nominal section width, the nominal aspect ratio, the type of structure symbol (where applicable) and the nominal rim diameter, must be grouped as shown in the above example: 185/70 R 14;
the load index and the speed category symbol are placed near the size designation. They may either precede or follow it or be placed above or below it;
the symbols ‘tubeless’, ‘reinforced’, and ‘M + S’ may be at a distance from the size designation.
These markings define a tyre:
having a nominal section width of 250,
having a nominal aspect ratio of 70,
of racial-ply structure (R),
having a nominal rim diameter of 508 mm, for which the symbol is 20,
having load capacities of 3 250 kg when single and 2 900 kg when twinned (dual), corresponding respectively to the load capacity indices 149 and 145 shown in Appendix 2,
classified in the nominal speed category J (reference speed 100 km/h),
able to be used additionally in speed category L (reference speed 120 km/h) with a load capacity of 3 000 kg when single and 2 725 kg when twinned (dual), corresponding respectively to the load capacity indices 146 and 143 shown in Appendix 2,
for fitting without an inner tube ‘tubeless’,
of ‘snow’ type,
manufactured during the twenty-fifth week of the year 1991, and
requiring to be inflated to 620 kPa for load/speed endurance tests, for which the PSI symbol is 90.
The positioning and order of the markings constituting the tyre designation are as follows:
the size designation, comprising the nominal section width, the nominal aspect ratio, the type-of-structure symbol (where applicable) and the nominal rim diameter, must be grouped as shown in the above example: 250/70 R 20;
the load indices and the speed category symbol are placed together near the size designation. They may either precede or follow it or be placed above or below it;
the symbols ‘Tubeless’, ‘M + S’ and ‘REGROOVABLE’ may be at a distance from the size designation;
if section 6.2.5 of Annex II is applied the additional load-capacity indices and speed-category symbol must be shown inside a circle near the nominal load-capacity indices and speed category symbol appearing on the tyre sidewall.
Pressure Index(‘PSI’) | bar | kPa |
---|---|---|
20 | 1.4 | 140 |
25 | 1.7 | 170 |
30 | 2.1 | 210 |
35 | 2.4 | 240 |
40 | 2.8 | 280 |
45 | 3.1 | 310 |
50 | 3.4 | 340 |
55 | 3.8 | 380 |
60 | 4.2 | 420 |
65 | 4.5 | 450 |
70 | 4.8 | 480 |
75 | 5.2 | 520 |
80 | 5.5 | 550 |
85 | 5.9 | 590 |
90 | 6.2 | 620 |
95 | 6.6 | 660 |
100 | 6.9 | 690 |
105 | 7.2 | 720 |
110 | 7.6 | 760 |
115 | 7.9 | 790 |
120 | 8.3 | 830 |
125 | 8.6 | 860 |
130 | 9.0 | 900 |
135 | 9.3 | 930 |
140 | 9.7 | 970 |
145 | 10.0 | 1 000 |
150 | 10.3 | 1 030 |
TABLE 1 | |||
Tyres in diagonal construction | |||
a Tolerances: see sections 6.1.4 and 6.1.5 of Annex II. | |||
b The following size designations are accepted:
| |||
Tyre size designation | Measuring rim width(inches) | Outer diametera(in mm) | Section widtha(in mm) |
---|---|---|---|
Super balloon series | |||
4.80-10 | 3.5 | 490 | 128 |
5.20-10 | 3.5 | 508 | 132 |
5.20-12 | 3.5 | 558 | 132 |
5.60-13 | 4 | 600 | 145 |
5.90-13 | 4 | 616 | 150 |
6.40-13 | 4.5 | 642 | 163 |
5.20-14 | 3.5 | 612 | 132 |
5.60-14 | 4 | 626 | 145 |
5.90-14 | 4 | 642 | 150 |
6.40-14 | 4.5 | 666 | 163 |
5.60-15 | 4 | 650 | 145 |
5.90-15 | 4 | 668 | 150 |
6.40-15 | 4.5 | 692 | 163 |
6.70-15 | 4.5 | 710 | 170 |
7.10-15 | 5 | 724 | 180 |
7.60-15 | 5.5 | 742 | 193 |
8.20-15 | 6 | 760 | 213 |
Low section series | |||
5.50-12 | 4 | 552 | 142 |
6.00-12 | 4.5 | 574 | 156 |
7.00-13 | 5 | 644 | 178 |
7.00-14 | 5 | 668 | 178 |
7.50-14 | 5.5 | 688 | 190 |
8.00-14 | 6 | 702 | 203 |
6.00-15 L | 4.5 | 650 | 156 |
Super low section seriesb | |||
155-13/6.15-13 | 4.5 | 582 | 157 |
165-13/6.45-13 | 4.5 | 600 | 167 |
175-13/6.95-13 | 5 | 610 | 178 |
155-14/6.15-14 | 4.5 | 608 | 157 |
165-14/6.45-14 | 4.5 | 626 | 167 |
175-14/6.95-14 | 5 | 638 | 178 |
185-14/7.35-14 | 5.5 | 654 | 188 |
195-14/7.75-14 | 5.5 | 670 | 198 |
Ultra low section | |||
5.9-10 | 4.5 | 483 | 148 |
6.5-13 | 4.5 | 586 | 166 |
6.9-13 | 4.5 | 600 | 172 |
7.3-13 | 5 | 614 | 184 |
TABLE 2 | |||
Tyres in radial construction | |||
a Tolerances: see sections 6.1.4 and 6.1.5 of Annex II. | |||
Tyre size designation | Measuring rim width(inches) | Outer diametera(in mm) | Section widtha(in mm) |
---|---|---|---|
5.60 R 13 | 4 | 606 | 145 |
5.90 R 13 | 4.5 | 626 | 155 |
6.40 R 13 | 4.5 | 640 | 170 |
7.00 R 13 | 5 | 644 | 178 |
7.25 R 13 | 5 | 654 | 184 |
5.90 R 14 | 4.5 | 654 | 155 |
5.60 R 15 | 4 | 656 | 145 |
6.40 R 15 | 4.5 | 690 | 170 |
6.70 R 15 | 5 | 710 | 180 |
140 R 12 | 4 | 538 | 138 |
150 R 12 | 4 | 554 | 150 |
150 R 13 | 4 | 580 | 149 |
160 R 13 | 4.5 | 596 | 158 |
170 R 13 | 5 | 608 | 173 |
150 R 14 | 4 | 606 | 149 |
180 R 15 | 5 | 676 | 174 |
TABLE 3 | |||
Millimetric series — radial | |||
a Tolerances: see sections 6.1.4 and 6.1.5 of Annex II. | |||
b On certain tyres the rim diameter can be expressed in mm:
(example: 125 R 225). | |||
Tyre size designationb | Measuring rim width(inches) | Outer diametera(in mm) | Section widtha(in mm) |
---|---|---|---|
125 R 10 | 3.5 | 459 | 127 |
145 R 10 | 4 | 492 | 147 |
125 R 12 | 3.5 | 510 | 178 |
135 R 12 | 4 | 522 | 184 |
145 R 12 | 4 | 542 | |
155 R 12 | 4.5 | 550 | 155 |
125 R 13 | 3.5 | 536 | 127 |
135 R 13 | 4 | 548 | 137 |
145 R 13 | 4 | 566 | 147 |
155 R 13 | 4.5 | 578 | 157 |
165 R 13 | 4.5 | 596 | 167 |
175 R 13 | 5 | 608 | 178 |
185 R 13 | 5.5 | 624 | 188 |
125 R 14 | 3.5 | 562 | 127 |
135 R 14 | 4 | 574 | 137 |
145 R 14 | 4 | 590 | 147 |
155 R 14 | 4.5 | 604 | 157 |
165 R 14 | 4.5 | 622 | 167 |
175 R 14 | 5 | 634 | 178 |
185 R 14 | 5.5 | 650 | 188 |
195 R 14 | 5.5 | 666 | 198 |
205 R 14 | 6 | 686 | 208 |
215 R 14 | 6 | 700 | 218 |
225 R 14 | 6.5 | 714 | 228 |
125 R 15 | 3.5 | 588 | 127 |
135 R 15 | 4 | 600 | 137 |
145 R 15 | 4 | 616 | 147 |
155 R 15 | 4.5 | 630 | 157 |
165 R 15 | 4.5 | 646 | 167 |
175 R 15 | 5 | 660 | 178 |
185 R 15 | 5.5 | 674 | 188 |
195 R 15 | 5.5 | 690 | 198 |
205 R 15 | 6 | 710 | 208 |
215 R 15 | 6 | 724 | 218 |
225 R 15 | 6.5 | 738 | 228 |
235 R 15 | 6.5 | 752 | 238 |
175 R 16 | 5 | 686 | 178 |
185 R 16 | 5.5 | 698 | 188 |
205 R 16 | 6 | 736 | 208 |
TABLE 4 | |||
70 Series — Radiala | |||
a Dimensional data applicable to some tyres in existence. For new approvals, dimensions calculated according to sections 6.1.1.1 and 6.1.2.1 of Annex II apply. | |||
b Tolerances: see sections 6.1.4 and 6.1.5 of Annex II. | |||
Tyre size designation | Measuring rim width(inches) | Outer diameterb(in mm) | Section widthb(in mm) |
---|---|---|---|
145/70 R 10 | 3.5 | 462 | 139 |
155/70 R 10 | 3.5 | 474 | 146 |
165/70 R 10 | 4.5 | 494 | 165 |
145/70 R 12 | 4 | 512 | 144 |
155/70 R 12 | 4 | 524 | 151 |
165/70 R 12 | 4.5 | 544 | 165 |
175/70 R 12 | 5 | 552 | 176 |
145/70 R 13 | 4 | 538 | 144 |
155/70 R 13 | 4 | 550 | 151 |
165/70 R 13 | 4.5 | 568 | 165 |
175/70 R 13 | 4.5 | 580 | 176 |
185/70 R 13 | 5 | 598 | 186 |
195/70 R 13 | 5.5 | 608 | 197 |
205/70 R 13 | 5.5 | 625 | 204 |
145/70 R 14 | 4 | 564 | 144 |
155/70 R 14 | 4 | 576 | 151 |
165/70 R 14 | 4.5 | 592 | 165 |
175/70 R 14 | 5 | 606 | 176 |
185/70 R 14 | 5 | 624 | 186 |
195/70 R 14 | 5.5 | 636 | 197 |
205/70 R 14 | 5.5 | 652 | 206 |
215/70 R 14 | 6 | 665 | 217 |
225/70 R 14 | 6 | 677 | 225 |
235/70 R 14 | 6.5 | 694 | 239 |
245/70 R 14 | 6.5 | 705 | 243 |
145/70 R 15 | 4 | 590 | 144 |
155/70 R 15 | 4 | 602 | 151 |
165/70 R 15 | 4.5 | 618 | 165 |
175/70 R 15 | 5 | 632 | 176 |
185/70 R 15 | 5 | 648 | 186 |
195/70 R 15 | 5.5 | 656 | 197 |
205/70 R 15 | 5.5 | 669 | 202 |
215/70 R 15 | 6 | 682 | 213 |
225/70 R 15 | 6 | 696 | 220 |
235/70 R 15 | 6.5 | 712 | 234 |
245/70 R 15 | 6.5 | 720 | 239 |
TABLE 5 | |||
60 Series radiala | |||
a Dimensional data applicable to some tyres in existence. For new approvals, dimensions calculated according to sections 6.1.1.1 and 6.1.2.1 of Annex III apply. | |||
b Tolerances: see sections 6.1.4 and 6.1.5 of Annex II. | |||
Tyre size designation | Measuring rim width(inches) | Outer diameterb(in mm) | Section widthb(in mm) |
---|---|---|---|
165/60 R 12 | 5 | 504 | 167 |
165/60 R 13 | 5 | 530 | 167 |
175/60 R 13 | 5.5 | 536 | 178 |
185/60 R 13 | 5.5 | 548 | 188 |
195/60 R 13 | 6 | 566 | 198 |
205/60 R 13 | 6 | 578 | 208 |
215/60 R 13 | 6 | 594 | 218 |
225/60 R 13 | 6.5 | 602 | 230 |
235/60 R 13 | 6.5 | 614 | 235 |
165/60 R 14 | 5 | 554 | 167 |
175/60 R 14 | 5.5 | 562 | 178 |
185/60 R 14 | 5.5 | 574 | 188 |
195/60 R 14 | 6 | 590 | 198 |
205/60 R 14 | 6 | 604 | 208 |
215/60 R 14 | 6 | 610 | 215 |
225/60 R 14 | 6 | 620 | 220 |
235/60 R 14 | 6.5 | 630 | 231 |
245/60 R 14 | 6.5 | 642 | 237 |
265/60 R 14 | 7 | 670 | 260 |
185/60 R 15 | 5.5 | 600 | 188 |
195/60 R 15 | 6 | 616 | 198 |
205/60 R 15 | 6 | 630 | 208 |
215/60 R 15 | 6 | 638 | 216 |
225/60 R 15 | 6.5 | 652 | 230 |
235/60 R 15 | 6.5 | 664 | 236 |
255/60 R 15 | 7 | 688 | 255 |
205/60 R 16 | 6 | 654 | 208 |
215/60 R 16 | 6 | 662 | 215 |
225/60 R 16 | 6 | 672 | 226 |
235/60 R 16 | 6.5 | 684 | 232 |
TABLE 6 | |||
High flotation tyres — radial | |||
a Tolerances: see sections 6.1.4 and 6.1.5 of Annex II. | |||
Tyre size designation | Measuring rim width(inches) | Outer diametera(in mm) | Section widtha(in mm) |
---|---|---|---|
27 × 8.50 R 14 | 7 | 674 | 218 |
30 × 9.50 R 15 | 7.5 | 750 | 240 |
31 × 10.50 R 15 | 8.5 | 775 | 268 |
31 × 11.50 R 15 | 9 | 775 | 290 |
32 × 11.50 R 15 | 9 | 801 | 290 |
33 × 12.50 R 15 | 10 | 826 | 318 |
TABLE 1 | |||
Commercial vehicle tyres | |||
RADIAL NORMAL SECTION SIZES MOUNTED ON 5o-TAPERED OR FLAT BASE RIMS | |||
Tyre size designation | Measuring-rim width(in inches) | Outer diameter(in mm) | Section width(in mm) |
---|---|---|---|
6.50 R 20 | 5.00 | 860 | 181 |
7.00 R 16 | 5.50 | 784 | 198 |
7.00 R 18 | 5.50 | 842 | 198 |
7.00 R 20 | 5.50 | 892 | 198 |
7.50 R 16 and/or A16 or 1-16 | 6.00 | 802 | 210 |
7.50 R 17 and/or A17 or 1-17 | 6.00 | 852 | 210 |
7.50 R 20 and/or A20 or 1-20 | 6.00 | 928 | 210 |
8.25 R 16 and/or B16 or 2-16 | 6.50 | 860 | 230 |
8.25 R 17 and/or B17 or 2-17 | 6.50 | 886 | 230 |
8.25 R 20 and/or B20 or 2-20 | 6.50 | 962 | 230 |
9.00 R 16 and/or C16 or 3-16 | 6.50 | 912 | 246 |
9.00 R 20 and/or C20 or 3-20 | 7.00 | 1 018 | 258 |
10.00 R 20 and/or D20 or 4-20 | 7.50 | 1 052 | 275 |
10.00 R 22 and/or D22 or 4-22 | 7.50 | 1 102 | 275 |
11.00 R 16 | 6.50 | 980 | 279 |
11.00 R 20 and/or E20 or 5-20 | 8.00 | 1 082 | 286 |
11.00 R 22 and/or E22 or 5-22 | 8.00 | 1 132 | 286 |
11.00 R 24 and/or E24 or 5-24 | 8.00 | 1 182 | 286 |
12.00 R 20 and/or F20 or 6-20 | 8.50 | 1 122 | 313 |
12.00 R 22 | 8.50 | 1 174 | 313 |
12.00 R 24 and/or F24 or 6-24 | 8.50 | 1 226 | 313 |
13.00 R 20 | 9.00 | 1 176 | 336 |
14.00 R 20 and/or G20 or 7-20 | 10.00 | 1 238 | 370 |
14.00 R 22 | 10.00 | 1 290 | 370 |
14.00 R 24 | 10.00 | 1 340 | 370 |
Tolerances: see sections 6.1.4 and 6.1.5 of Annex II.U.K.
TABLE 2 | |||
Commercial vehicle tyres | |||
DIAGONAL | |||
DIAGONAL NORMAL SECTION SIZES MOUNTED ON 5o-TAPERED OR FLAT BASE RIMS | |||
Tyre size designation | Measuring-rim width(in inches) | Outer diameter(in mm) | Section width(in mm) |
---|---|---|---|
7.00-16 | 5.50 | 774 | 198 |
7.00-20 | 5.50 | 898 | 198 |
7.50-16 and/or A16 or 1-16 | 6.00 | 806 | 210 |
7.50-17 and/or A17 or 1-17 | 6.00 | 852 | 210 |
7.50-20 and/or A20 or 1-20 | 6.00 | 928 | 213 |
8.25-16 and/or B16 or 2-16 | 6.50 | 860 | 234 |
8.25-17 and/or B17 or 2-17 | 6.50 | 895 | 234 |
8.25-20 and/or B20 or 2-20 | 6.50 | 970 | 234 |
9.00-16 | 6.50 | 900 | 252 |
9.00-20 and/or C20 or 3-20 | 7.00 | 1 012 | 256 |
9.00-24 and/or C24 or 3-24 | 7.00 | 1 114 | 256 |
10.00-20 and/or D20 or 4-20 | 7.50 | 1 050 | 275 |
10.00-22 and/or D22 or 4-22 | 7.50 | 1 102 | 275 |
11.00-20 and/or E20 or 5-20 | 8.00 | 1 080 | 291 |
11.00-22 and/or E22 or 5-22 | 8.00 | 1 130 | 291 |
11.00-24 and/or E24 or 5-24 | 8.00 | 1 180 | 291 |
12.00-18 | 8.50 | 1 070 | 312 |
12.00-20 and/or F20 or 6-20 | 8.50 | 1 120 | 312 |
12.00-22 and/or F22 or 6-22 | 8.50 | 1 172 | 312 |
12.00-24 and/or F24 or 6-24 | 8.50 | 1 220 | 312 |
13.00-20 | 9.00 | 1 170 | 342 |
14.00-20 and/or G20 or 7-20 | 10.00 | 1 238 | 375 |
14.00-22 and/or G22 or 7-22 | 10.00 | 1 290 | 375 |
14.00-24 and/or G24 or 7-24 | 10.00 | 1 340 | 375 |
15.00-20 | 11.25 | 1 295 | 412 |
16.00-20 | 13.00 | 1 370 | 446 |
Tolerances: see sections 6.1.4 and 6.1.5 of Annex II.U.K.
TABLE 3 | |||
Commercial vehicle tyres | |||
RADIAL NORMAL SECTION SIZES MOUNTED ON 15o-TAPERED RIMS (DROP-CENTRE) | |||
Tyre size designation | Measuring-rim width(in inches) | Outer diameter(in mm) | Section width(in mm) |
---|---|---|---|
8 R 17.5 | 6.00 | 784 | 208 |
8.5 R 17.5 | 6.00 | 802 | 215 |
9 R 17.5 | 6.75 | 820 | 230 |
9.5 R 17.5 | 6.75 | 842 | 240 |
10 R 17.5 | 7.50 | 858 | 254 |
11 R 17.5 | 8.25 | 900 | 279 |
7 R 19.5 | 5.25 | 800 | 185 |
8 R 19.5 | 6.00 | 856 | 208 |
8 R 22.5 | 6.00 | 936 | 208 |
9 R 19.5 | 6.75 | 894 | 230 |
9 R 22.5 | 6.75 | 970 | 230 |
9.5 R 19.5 | 6.75 | 916 | 240 |
10 R 19.5 | 7.50 | 936 | 254 |
10 R 22.5 | 7.50 | 1 020 | 254 |
11 R 19.5 | 8.25 | 970 | 279 |
11 R 22.5 | 8.25 | 1 050 | 279 |
11 R 24.5 | 8.25 | 1 100 | 279 |
12 R 19.5 | 9.00 | 1 008 | 300 |
12 R 22.5 | 9.00 | 1 084 | 300 |
13 R 22.5 | 9.75 | 1 124 | 320 |
TABLE 4 | |||
DIAGONAL NORMAL SECTION SIZES MOUNTED ON 15o-TAPERED RIMS (DROP-CENTRE) | |||
Tyre size designation | Measuring-rim width(in inches) | Outer diameter(in mm) | Section width(in mm) |
---|---|---|---|
8-19.5 | 6.00 | 856 | 208 |
9-19.5 | 6.75 | 894 | 230 |
9-22.5 | 6.75 | 970 | 230 |
10-22.5 | 7.50 | 1 020 | 254 |
11-22.5 | 8.25 | 1 054 | 279 |
11-24.5 | 8.25 | 1 100 | 279 |
12-22.5 | 9.00 | 1 084 | 300 |
Tolerance: see sections 6.1.4 and 6.1.5 of Annex II.U.K.
TABLE 5 | |||
Commercial vehicle tyres | |||
RADIAL ‘WIDE BASE’ SIZES MOUNTED ON 15o-TAPERED RIMS (DROP-CENTRE) | |||
Tyre size designation | Measuring-rim width(in inches) | Outer diameter(in mm) | Section width(in mm) |
---|---|---|---|
14 R 19.5 | 10.50 | 962 | 349 |
15 R 19.5 | 11.75 | 998 | 387 |
15 R 22.5 | 11.75 | 1 074 | 387 |
16.5 R 19.5 | 13.00 | 1 046 | 425 |
16.5 R 22.5 | 13.00 | 1 122 | 425 |
18 R 19.5 | 14.00 | 1 082 | 457 |
18 R 22.5 | 14.00 | 1 158 | 457 |
19.5 R 19.5 | 15.00 | 1 134 | 495 |
21 R 22.5 | 16.50 | 1 246 | 540 |
TABLE 6 | |||
DIAGONAL ‘WIDE BASE’ SIZES MOUNTED ON 15o-TAPERED RIMS (DROP-CENTRE) | |||
Tyre size designation | Measuring-rim width(in inches) | Outer diameter(in mm) | Section width(in mm) |
---|---|---|---|
15-19.5 | 11.75 | 1 004 | 387 |
15-22.5 | 11.75 | 1 080 | 387 |
16.5-19.5 | 13.00 | 1 052 | 425 |
16.5-22.5 | 13.00 | 1 128 | 425 |
18-19.5 | 14.00 | 1 080 | 457 |
18-22.5 | 14.00 | 1 156 | 457 |
19.5-19.5 | 15.00 | 1 138 | 495 |
21-22.5 | 16.50 | 1 246 | 540 |
Tolerances: see sections 6.1.4 and 6.1.5 of Annex II.U.K.
TABLE 7 | |||
Commercial vehicle tyres | |||
RADIAL ‘80’ SERIES MOUNTED ON 5o TAPERED OR FLAT-BASE RIMS | |||
Tyre size designation | Measuring-rim width(in inches) | Outer diameter(in mm) | Section width(in mm) |
---|---|---|---|
12/80 R 20 | 8.50 | 1 008 | 305 |
13/80 R 20 | 9.00 | 1 048 | 326 |
14/80 R 20 | 10.00 | 1 090 | 350 |
14/80 R 24 | 10.00 | 1 192 | 350 |
14.75/80 R 20 | 10.00 | 1 124 | 370 |
15.5/80 R 20 | 10.00 | 1 158 | 384 |
TABLE 8 | |||
RADIAL ‘70’ SERIES MOUNTED ON 15o TAPERED RIMS (DROP-CENTRE) | |||
Tyre size designation | Measuring-rim width(in inches) | Outer diameter(in mm) | Section width(in mm) |
---|---|---|---|
9/70 R 22.5 | 6.75 | 892 | 229 |
10/70 R 22.5 | 7.50 | 928 | 254 |
11/70 R 22.5 | 8.25 | 962 | 279 |
12/70 R 22.5 | 9.00 | 999 | 305 |
13/70 R 22.5 | 9.75 | 1 033 | 330 |
TABLE 9 | |||
RADIAL ‘80’ SERIES MOUNTED ON 15o TAPERED RIMS (DROP-CENTRE) | |||
Tyre size designation | Measuring-rim width(in inches) | Outer diameter(in mm) | Section width(in mm) |
---|---|---|---|
12/80 R 22.5 | 9.00 | 1 046 | 305 |
Tolerances: see sections 6.1.4 and 6.1.5 of Annex II.U.K.
TABLE 10 | |||
Commercial vehicle tyres | |||
RADIAL TYRES FOR LIGHT COMMERCIAL VEHICLES MOUNTED ON RIM OF 16″ DIAMETER AND OVER | |||
Tyre size designation | Measuring-rim width(in inches) | Outer diameter(in mm) | Section width(in mm) |
---|---|---|---|
6.00 R 16 C | 4.50 | 728 | 170 |
6.00 R 18 C | 4.00 | 782 | 165 |
6.50 R 16 C | 4.50 | 742 | 176 |
6.50 R 17 C | 4.50 | 772 | 176 |
6.50 R 17 LC | 4.50 | 726 | 166 |
6.50 R 20 C | 5.00 | 860 | 181 |
7.00 R 16 C | 5.50 | 778 | 198 |
7.50 R 16 C | 6.00 | 802 | 210 |
7.50 R 17 C | 6.00 | 852 | 210 |
TABLE 11 | |||
DIAGONAL TYRES FOR LIGHT COMMERCIAL VEHICLES MOUNTED ON RIM OF 16″ DIAMETER AND OVER | |||
Tyre size designation | Measuring-rim width(in inches) | Outer diameter(in mm) | Section width(in mm) |
---|---|---|---|
6.00-16 C | 4.50 | 730 | 170 |
6.00-18 C | 4.00 | 786 | 165 |
6.00-20 C | 5.00 | 842 | 172 |
6.50-20 C | 4.50 | 748 | 176 |
6.50-17 LC | 4.50 | 726 | 166 |
6.50-20 C | 5.00 | 870 | 181 |
7.00-16 C | 5.50 | 778 | 198 |
7.00-18 C | 5.50 | 848 | 198 |
7.00-20 C | 5.50 | 898 | 198 |
7.50-16 C | 6.00 | 806 | 210 |
7.50-17 C | 6.00 | 852 | 210 |
8.25-16 C | 6.50 | 860 | 234 |
8.90-16 C | 6.50 | 885 | 250 |
9.00-16 C | 6.50 | 900 | 252 |
Tolerances: see sections 6.1.4 and 6.1.5 of Annex II.U.K.
Commercial vehicle tyres
RADIAL TYRES FOR LIGHT COMMERCIAL VEHICLES MOUNTED ON 5o TAPERED RIMS | |||
Rim diameter 12″ — 15″ | |||
(DROP-CENTRE) | |||
Tyre size designation | Measuring-rim width(in inches) | Outer diameter(in mm) | Section width(in mm) |
---|---|---|---|
‘Super balloon’ series | |||
5.60 R 12 C | 4.00 | 570 | 150 |
6.40 R 13 C | 5.00 | 648 | 172 |
6.70 R 13 C | 5.00 | 660 | 180 |
6.70 R 14 C | 5.00 | 688 | 180 |
6.70 R 15 C | 5.00 | 712 | 180 |
7.00 R 15 C | 5.50 | 744 | 195 |
‘Low section’ series | |||
6.50 R 14 C | 5.00 | 640 | 170 |
7.00 R 14 C | 5.00 | 650 | 180 |
7.50 R 14 C | 5.50 | 686 | 195 |
TYRES FOR LIGHT COMMERCIAL VEHICLES MOUNTED ON 15o TAPERED RIMS (DROP-CENTRE) | |||
Tyre size designation | Measuring-rim width(in inches) | Outer diameter(in mm) | Section width(in mm) |
---|---|---|---|
7 R 17.5 C | 5.25 | 752 | 185 |
8 R 17.5 C | 6.00 | 784 | 208 |
Tolerances: see sections 6.1.4 and 6.1.5 of Annex II.U.K.
TABLE 13 | |||
Commercial vehicle tyres | |||
DIAGONAL TYRES FOR LIGHT COMMERCIAL VEHICLES MOUNTED ON 5o TAPERED RIMS (DROP CENTRE) | |||
Rim diameter 12″ — 15″ | |||
Tyre size designation | Measuring-rim width(in inches) | Outer diameter(in mm) | Section width(in mm) |
---|---|---|---|
‘Super balloon’ series | |||
5.20-12 C | 3.50 | 560 | 136 |
5.60-12 C | 4.00 | 572 | 148 |
5.60-13 C | 4.00 | 598 | 148 |
5.90-13 C | 4.50 | 616 | 158 |
5.90-14 C | 4.50 | 642 | 158 |
5.90-15 C | 4.50 | 668 | 158 |
6.40-13 C | 5.00 | 640 | 172 |
6.40-14 C | 5.00 | 666 | 172 |
6.40-15 C | 5.00 | 692 | 172 |
6.40-16 C | 4.50 | 748 | 172 |
6.70-13 C | 5.00 | 662 | 180 |
6.70-14 C | 5.00 | 688 | 180 |
6.70-15 C | 5.00 | 714 | 180 |
‘Low section’ series | |||
5.50-12 C | 4.00 | 552 | 142 |
6.00-12 C | 4.50 | 574 | 158 |
6.00-14 C | 4.50 | 626 | 158 |
6.50-14 C | 5.00 | 650 | 172 |
6.50-15 C | 5.00 | 676 | 172 |
7.00-14 C | 5.00 | 668 | 182 |
7.50-14 C | 5.50 | 692 | 192 |
‘Balloon’ series | |||
7.00-15 C | 5.50 | 752 | 198 |
7.50-15 C | 6.00 | 780 | 210 |
‘Millimetric’ series | |||
125-12 C | 3.50 | 514 | 127 |
165-15 C | 4.50 | 652 | 167 |
185-14 C | 5.50 | 654 | 188 |
195-14 C | 5.50 | 670 | 198 |
245-16 C | 7.00 | 798 | 248 |
17-15 C or | 5.00 | 678 | 178 |
17-380 C | 5.00 | 678 | 178 |
17-400 C | 19 × 400 mm | 702 | 186 |
19-400 C | 19 × 400 mm | 736 | 200 |
21-400 C | 19 × 400 mm | 772 | 216 |
Tolerances: see sections 6.1.4 and 6.1.5 of Annex II.U.K.
TABLE 14 | |||
Commercial vehicle tyres | |||
RADIAL TYRES FOR LIGHT COMMERCIAL VEHICLES MOUNTED ON 5o TAPERED RIMS (DROP-CENTRE) RIMS | |||
‘Millimetric’ series | |||
Tyre size designation | Measuring-rim width(in inches) | Outer diameter(in mm) | Section width(in mm) |
---|---|---|---|
125 R 12 C | 3.50 | 510 | 127 |
125 R 13 C | 3.50 | 536 | 127 |
125 R 14 C | 3.00 | 562 | 127 |
125 R 15 C | 3.50 | 588 | 127 |
135 R 12 C | 4.00 | 522 | 137 |
135 R 13 C | 4.00 | 548 | 137 |
135 R 14 C | 4.00 | 574 | 137 |
135 R 15 C | 4.00 | 600 | 137 |
145 R 10 C | 4.00 | 492 | 147 |
145 R 12 C | 4.00 | 542 | 147 |
145 R 13 C | 4.00 | 566 | 147 |
145 R 14 C | 4.00 | 590 | 147 |
145 R 15 C | 4.00 | 616 | 147 |
155 R 12 C | 4.50 | 550 | 157 |
155 R 13 C | 4.50 | 578 | 157 |
155 R 14 C | 4.50 | 604 | 157 |
155 R 15 C | 4.50 | 630 | 157 |
155 R 16 C | 4.50 | 656 | 157 |
165 R 13 C | 4.50 | 596 | 167 |
165 R 14 C | 4.50 | 622 | 167 |
165 R 15 C | 4.50 | 646 | 167 |
165 R 16 C | 4.50 | 672 | 167 |
175 R 13 C | 5.00 | 608 | 178 |
175 R 14 C | 5.00 | 634 | 178 |
175 R 15 C | 5.00 | 660 | 178 |
175 R 16 C | 5.00 | 684 | 178 |
185 R 13 C | 5.50 | 624 | 188 |
185 R 14 C | 5.50 | 650 | 188 |
185 R 15 C | 5.50 | 674 | 188 |
185 R 16 C | 5.50 | 700 | 188 |
195 R 14 C | 5.50 | 666 | 198 |
195 R 15 C | 5.50 | 690 | 198 |
195 R 16 C | 5.50 | 716 | 198 |
205 R 14 C | 6.00 | 686 | 208 |
205 R 15 C | 6.00 | 710 | 208 |
205 R 16 C | 6.00 | 736 | 208 |
215 R 14 C | 6.00 | 700 | 218 |
215 R 15 C | 6.00 | 724 | 218 |
215 R 16 C | 6.00 | 750 | 218 |
225 R 14 C | 6.50 | 714 | 228 |
225 R 15 C | 6.50 | 738 | 228 |
225 R 16 C | 6.50 | 764 | 228 |
235 R 14 C | 6.50 | 728 | 238 |
235 R 15 C | 6.50 | 752 | 238 |
235 R 16 C | 6.50 | 778 | 238 |
17 R 15 C or | 5.00 | 678 | 178 |
17 R 380 C | 5.00 | 678 | 178 |
17 R 400 C | 19 × 400 mm | 698 | 186 |
19 R 400 C | 19 × 400 mm | 728 | 200 |
Tolerances: see sections 6.1.4 and 6.1.5 of Annex II.U.K.
TABLE 15 | |||
Commercial vehicle tyres | |||
DIAGONAL WIDE-BASE TYRES FOR MULTIPURPOSE TRUCKS ON HIGHWAY, OFF-THE-ROAD AND AGRICULTURAL SERVICES | |||
Tyre size designation | Measuring-rim width(in inches) | Outer diameter(in mm) | Section width(in mm) |
---|---|---|---|
10.5-18 MPT | 9 | 905 | 270 |
10.5-20 MPT | 9 | 955 | 270 |
12.5-18 MPT | 11 | 990 | 325 |
12.5-20 MPT | 11 | 1 040 | 325 |
14.5-20 MPT | 11 | 1 095 | 355 |
14.5-24 MPT | 11 | 1 195 | 355 |
7.50-18 MPT | 5.50 | 885 | 208 |
TABLE 16 | |||
RADIAL WIDE-BASE TYRES FOR MULTIPURPOSE TRUCKS ON HIGHWAY, OFF-THE-ROAD AND AGRICULTURAL SERVICES | |||
Tyre size designation | Measuring-rim width(in inches) | Outer diameter(in mm) | Section width(in mm) |
---|---|---|---|
10.5 R 20 MPT | 9 | 955 | 276 |
12.5 R 20 MPT | 11 | 1 040 | 330 |
14.5 R 20 MPT | 11 | 1 095 | 362 |
14.5 R 24 MPT | 11 | 1 195 | 362 |
Tolerances: see sections 6.1.4 and 6.1.5 of Annex II.U.K.
TABLE 17 | |||
Commercial vehicle tyres | |||
RADIAL ‘FREE-ROLLING’ TYRES IN HIGHWAY SERVICE | |||
Tyre size designation | Measuring-rim width(in inches) | Outer diameter(in mm) | Section width(in mm) |
---|---|---|---|
5.00 R 8 | 3.00 | 467 | 132 |
6.00 R 9 | 4.00 | 540 | 160 |
7.00 R 12 | 5.00 | 672 | 192 |
7.50 R 15 | 6.00 | 772 | 212 |
8.25 R 15 | 6.50 | 836 | 234 |
10.00 R 15 | 7.50 | 918 | 275 |
TABLE 18 | |||
DIAGONAL ‘FREE-ROLLING’ TYRES IN HIGHWAY SERVICE | |||
Tyre size designation | Measuring-rim width(in inches) | Outer diameter(in mm) | Section width(in mm) |
---|---|---|---|
6.00-9 | 4.00 | 540 | 160 |
7.00-12 | 5.00 | 672 | 192 |
7.00-15 | 5.00 | 746 | 192 |
7.50-15 | 6.00 | 772 | 212 |
8.25-15 | 6.50 | 836 | 234 |
10.00-15 | 7.50 | 918 | 275 |
200-15 | 6.50 | 730 | 205 |
TABLE 19 | |||
DIAGONAL ‘75’ SERIES MOUNTED ON 15o TAPERED RIMS | |||
Tyre size designation | Measuring-rim width(in inches) | Outer diameter(in mm) | Section width(in mm) |
---|---|---|---|
7.25/75-16.5 or 7.25-16.5 | 5.25 | 695 | 182 |
8.00/75-16.5 or 8.00-16.5 | 6.00 | 724 | 203 |
8.75/75-16.5 or 8.75-16.5 | 6.75 | 752 | 224 |
9.50/75-16.5 or 9.50-16.5 | 7.50 | 781 | 245 |
Tolerances: see sections 6.1.4 and 6.1.5 of Annex II.U.K.
Commercial vehicle tyres
DIAGONAL | |||
DIAGONAL AND RADIAL TYRES MOUNTED ON FLAT BASE OR DIVIDED RIMS | |||
a Also marked 18 × 7. | |||
Tyre size designation | Measuring-rim width(in inches) | Outer diameter(in mm) | Section width(in mm) |
---|---|---|---|
3.00-4 | 2.10 | 255 | 81 |
4.00-4 | 2.50 | 312 | 107 |
4.00-8 | 2.50 | 414 | 107 |
5.00-8 | 3.00 | 467 | 132 |
6.50-10 | 5.00 | 588 | 177 |
7.00-9 | 5.00 | 562 | 174 |
7.50-10 | 5.50 | 645 | 207 |
8.25-10 | 6.50 | 698 | 240 |
10.50-13 | 6.00 | 889 | 275 |
10.50-16 | 6.00 | 965 | 275 |
11.00-16 | 6.00 | 952 | 272 |
14.00-16 | 10.00 | 1 139 | 375 |
15 × 4.5-2 | 3.25 | 385 | 122 |
16 × 6-8 | 4.33 | 425 | 152 |
18 × 7-8a | 4.33 | 462 | 173 |
21 × 4 | 2.32 | 565 | 113 |
21 × 8-9 | 6.00 | 535 | 200 |
23 × 9-10 | 6.50 | 595 | 225 |
22 × 4.5 | 3.11 | 595 | 132 |
23 × 5 | 3.75 | 635 | 155 |
25 × 6 | 3.75 | 680 | 170 |
27 × 6 | 4.33 | 758 | 188 |
27 × 10-12 | 8.00 | 690 | 255 |
28 × 6 | 3.75 | 760 | 170 |
28 × 9-15 | 7.00 | 707 | 216 |
(8.15-15) | 7.00 | 707 | 216 |
29 × 7 | 5.00 | 809 | 211 |
29 × 8 | 6.00 | 809 | 243 |
9.00-15 | 6.00 | 840 | 249 |
2.50-15 | 7.50 | 735 | 250 |
3.00-15 | 8.00 | 840 | 300 |
RADIAL | |||
Tyre size designation | Measuring-rim width(in inches) | Outer diameter(in mm) | Section width(in mm) |
---|---|---|---|
6.50 R 10 | 5.00 | 588 | 177 |
7.00 R 15 | 5.50 | 746 | 197 |
7.50 R 10 | 5.50 | 645 | 207 |
15 × 4.5 R 8 | 3.25 | 385 | 122 |
16 × 6 R 8 | 4.33 | 425 | 152 |
18 × 7 R 8 | 4.33 | 462 | 173 |
560 × 165 R 11 | 5.00 | 560 | 175 |
680 × 180 R 15 | 5.00 | 680 | 189 |
Tolerances: see sections 6.1.4 and 6.1.5 of Annex II.U.K.
TABLE 21 | |||||
Tyres for trucks, buses, trailers and multipurpose passenger vehicles in normal highway service | |||||
DIAGONAL AND RADIAL TYRES MOUNTED ON 5o DROP-CENTRE OR SEMI-DROP-CENTRE RIMS | |||||
a Overall tyre widths may exceed the above section widths by 8 %. | |||||
b Tolerance + 8 % of the difference between the above outer diameter and the nominal rim diameters. | |||||
Tyre size designation | Measuring-rim width(in inches) | Section width(in mm)a | Outer diameter | ||
---|---|---|---|---|---|
Diagonal | Radial | Highway tread(in mm)b | Mud and snow(in mm)b | ||
6.00-16 LT | 6.00 R 16 LT | 4.50 | 173 | 732 | 743 |
6.50-16 LT | 6.50 R 16 LT | 4.50 | 182 | 755 | 767 |
6.70-15 LT | 6.70 R 15 LT | 5.00 | 191 | 722 | 733 |
7.00-13 LT | 7.00 R 13 LT | 5.00 | 187 | 647 | 658 |
7.00-14 LT | 7.00 R 14 LT | 5.00 | 187 | 670 | 681 |
7.00-15 LT | 7.00 R 15 LT | 5.50 | 202 | 752 | 763 |
7.00-16 LT | 7.00 R 16 LT | 5.50 | 202 | 778 | 788 |
7.10-15 LT | 7.10 R 15 LT | 5.00 | 199 | 738 | 749 |
7.50-15 LT | 7.50 R 15 LT | 6.00 | 220 | 782 | 794 |
7.50-16 LT | 7.50 R 16 LT | 6.00 | 220 | 808 | 819 |
8.25-16 LT | 8.25 R 16 LT | 6.50 | 241 | 859 | 869 |
9.00-16 LT | 9.00 R 16 LT | 6.50 | 257 | 890 | 903 |
D78-14 LT | DR 78-14 LT | 5.00 | 192 | 661 | 672 |
E78-14 LT | ER 78-14 LT | 5.50 | 199 | 667 | 678 |
C78-15 LT | CR 78-15 LT | 5.00 | 187 | 672 | 683 |
G78-15 LT | GR 78-15 LT | 6.00 | 212 | 711 | 722 |
H78-15 LT | HR 78-15 LT | 6.00 | 222 | 727 | 739 |
L78-15 LT | LR 78-15 LT | 6.50 | 236 | 749 | 760 |
F78-16 LT | FR 78-16 LT | 5.50 | 202 | 721 | 732 |
H78-16 LT | HR 78-16 LT | 6.00 | 222 | 753 | 764 |
L78-16 LT | LR 78-16 LT | 6.50 | 236 | 775 | 786 |
Tyres for trucks, buses, trailers and multipurpose passenger vehicles in normal highway service
DIAGONAL AND RADIAL TYRES MOUNTED ON 15o DROP-CENTRE RIMS
TABLE 22.1 | |||||
a Overall tyre widths may exceed the above section widths by 8 %. | |||||
b Tolerance + 8 % of the difference between the above outer diameters and the nominal rim diameters. | |||||
Tyre size designation | Measuring-rim width(inches) | Section width(mm)a | Outer diameter | ||
---|---|---|---|---|---|
Diagonal | Radial | Highway tread(mm)b | Mud and snow(mm)b | ||
7-14.5 LT | — | 6.00 | 185 | 677 | — |
8-14.5 LT | — | 6.00 | 203 | 707 | — |
9-14.5 LT | — | 7.00 | 241 | 711 | — |
7-17.5 LT | 7 R 17.5 LT | 5.25 | 189 | 758 | 769 |
8-17.5 LT | 8 R 17.5 LT | 5.25 | 199 | 788 | 799 |
TABLE 22.2 | |||||
a Overall tyre widths may exceed the above section widths by 7 %. | |||||
b Tolerance + 8 % of the difference between the above outer diameter and the nominal rim diameters. | |||||
Tyre size designation | Measuring-rim width(inches) | Section width(mm)a | Outer diameter | ||
---|---|---|---|---|---|
Diagonal | Radial | Highway tread(mm)b | Mud and snow(mm)b | ||
8.00-16.5 LT | 8.00 R 16.5 LT | 6.00 | 203 | 720 | 730 |
8.75-16.5 LT | 8.75 R 16.5 LT | 6.75 | 222 | 748 | 759 |
9.50-16.5 LT | 9.50 R 16.5 LT | 6.75 | 241 | 776 | 787 |
10-16.5 LT | 10 R 16.5 LT | 8.25 | 264 | 762 | 773 |
10-17.5 LT | 10 R 17.5 LT | 8.25 | 264 | 787 | 798 |
12-16.5 LT | 12 R 16.5 LT | 9.75 | 307 | 818 | 831 |
30 × 9.50-16.5 LT | 30 × 9.50 R 16.5 LT | 7.50 | 240 | 750 | 761 |
31 × 10.50-16.5 LT | 31 × 10.50 R 16.5 LT | 8.25 | 266 | 775 | 787 |
33 × 10.50-16.5 LT | 33 × 12.50 R 16.5 LT | 9.75 | 315 | 826 | 838 |
37 × 10.50-16.5 LT | 37 × 14.50 R 16.5 LT | 11.25 | 365 | 928 | 939 |
TABLE 23 | ||||||
Tyres for trucks, buses, trailers in normal highway service | ||||||
DIAGONAL AND RADIAL TYRES MOUNTED ON 15o DROP-CENTRE RIMS | ||||||
a Overall tyre widths may exceed the above section widths by 6 %. | ||||||
b Tolerance + 5 % of the difference between the above outer diameter and the nominal rim diameters. | ||||||
Tyre size designation | Measuring-rim width(inches) | Section width(mm)a | Outer diameter | |||
---|---|---|---|---|---|---|
Diagonal | Radial | Highway tread(mm)b | Heavy tread(mm)b | Mud and snow(mm)b | ||
Normal-section tyres | ||||||
7-22.5 | 7 R 22.5 | 5.25 | 178 | 878 | — | 894 |
8-19.5 | 8 R 19.5 | 6.00 | 203 | 859 | — | 876 |
8-22.5 | 8 R 22.5 | 6.00 | 203 | 935 | — | 952 |
9-22.5 | 9 R 22.5 | 6.75 | 229 | 974 | 982 | 992 |
10-22.5 | 10 R 22.5 | 7.50 | 254 | 1 019 | 1 031 | 1 038 |
11-22.5 | 11 R 22.5 | 8.25 | 279 | 1 054 | 1 067 | 1 037 |
11-24.5 | 11 R 24.5 | 8.25 | 279 | 1 104 | 1 118 | 1 123 |
12-22.5 | 12 R 22.5 | 9.00 | 300 | 1 085 | 1 099 | 1 104 |
12-24.5 | 12 R 24.5 | 9.00 | 300 | 1 135 | 1 150 | 1 155 |
12.5-22.5 | 12.5 R 22.5 | 9.00 | 302 | 1 085 | 1 099 | 1 104 |
12.5-22.5 | 12.5 R 24.5 | 9.00 | 302 | 1 135 | 1 150 | 1 155 |
Wide-base tyres | ||||||
14-17.5 | 14 R 17.5 | 10.50 | 349 | 907 | — | 921 |
15-19.5 | 15 R 19.5 | 11.75 | 389 | 1 005 | — | 1 019 |
15-22.5 | 15 R 22.5 | 11.75 | 389 | 1 082 | — | 1 095 |
16.5-19.5 | 16.5 R 19.5 | 13.00 | 425 | 1 052 | — | 1 068 |
16.5-22.5 | 16.5 R 22.5 | 13.00 | 425 | 1 128 | — | 1 144 |
18-19.5 | 18 R 19.5 | 14.00 | 457 | 1 080 | — | 1 096 |
18-22.5 | 18 R 22.5 | 14.00 | 457 | 1 158 | — | 1 172 |
19.5-19.5 | 19.5 R 19.5 | 15.00 | 495 | 1 138 | — | 1 156 |
TABLE 24 | ||||||
Tyres for trucks, buses, trailers in normal highway service | ||||||
DIAGONAL AND RADIAL TYRES MOUNTED ON 5o DROP-CENTRE RIMS | ||||||
a Overall tyre widths may exceed the above section widths by 6 %. | ||||||
b Tolerance + 6 % of the difference between the above outer diameter and the nominal rim diameters. | ||||||
Tyre size designation | Measuring-rim width(inches) | Section width(mm)a | Outer diameter | |||
---|---|---|---|---|---|---|
Diagonal | Radial | Highway tread(mm)b | Heavy tread(mm)b | Mud and snow(mm)b | ||
— | 8R14LT | 7.00 | 216 | 667 | — | — |
9-15LT | — | 8.00 | 254 | 744 | 755 | — |
10-15LT | 10R15LT | 8.00 | 264 | 773 | 783 | — |
10-16LT | — | 8.00 | 264 | 798 | 809 | — |
11-14LT | — | 8.00 | 279 | 752 | 763 | — |
11-15LT | 11R15LT | 8.00 | 279 | 777 | 788 | — |
11-16LT | — | 8.00 | 279 | 803 | 813 | — |
12-15LT | — | 10.00 | 318 | 823 | 834 | — |
— | 9R15LT | 8.00 | 254 | 744 | 755 | 752 |
24 × 7.50-13LT | 24 × 7.50R13LT | 6.00 | 191 | 597 | 609 | 604 |
27 × 8.50-14LT | 27 × 8.50-14LT | 7.00 | 218 | 674 | 685 | 680 |
28 × 8.50-15LT | 28 × 8.50-15LT | 7.00 | 218 | 699 | 711 | 705 |
29 × 9.50-15LT | 29 × 9.50-15LT | 7.50 | 240 | 724 | 736 | 731 |
30 × 9.50-15LT | 30 × 9.50-15LT | 7.50 | 240 | 750 | 761 | 756 |
31 × 10.50-15LT | 31 × 10.50-15LT | 8.50 | 268 | 775 | 787 | 781 |
31 × 11.50-15LT | 31 × 11.50-15LT | 9.00 | 290 | 775 | 787 | 781 |
32 × 11.50-15LT | 32 × 11.50-15LT | 9.00 | 290 | 801 | 812 | 807 |
33 × 12.50-15LT | 33 × 12.50-15LT | 10.00 | 318 | 826 | 838 | 832 |
35 × 12.50-15LT | 35 × 12.50-15LT | 10.00 | 318 | 877 | 888 | 883 |
37 × 12.50-15LT | 37 × 12.50-15LT | 10.00 | 318 | 928 | 939 | 934 |
31 × 13.50-15LT | 31 × 13.50-15LT | 11.00 | 345 | 775 | 787 | 781 |
37 × 14.50-15LT | 37 × 14.50-15LT | 12.00 | 372 | 928 | 939 | 934 |
31 × 15.50-15LT | 31 × 15.50-15LT | 12.00 | 390 | 775 | 787 | 781 |
TABLE 25 | ||||||
Tyres for trucks, buses and trailers in normal highway service | ||||||
DIAGONAL AND RADIAL TYRES MOUNTED ON MULTI-PIECE BYMS | ||||||
a Overall tyre widths may exceed the above section widths by 6 %. | ||||||
b Tolerance + 6 % of the difference between the above outer diameter and the nominal rim diameters. | ||||||
Tyre size designation | Measuring-rim width(inches) | Section width(mm)a | Outer diameter | |||
---|---|---|---|---|---|---|
Diagonal | Radhal | Highway tread(mm)b | Heavy tread(mm)b | Mud and snow(mm)b | ||
6.50-20 | 6.50R20 | 5.00 | 184 | 878 | — | 1 049 |
7.00-15TR | 7.00R15TR | 5.50 | 199 | 777 | — | 962 |
7.00-17 | 7.00R17 | 5.50 | 199 | 828 | — | 843 |
7.00-18 | 7.00R18 | 5.50 | 199 | 853 | — | 868 |
7.00-20 | 7.00R20 | 5.50 | 199 | 904 | — | 919 |
7.50-15TR | 7.50R15TR | 6.00 | 215 | 808 | — | 825 |
7.50-17 | 7.50R17 | 6.00 | 215 | 859 | — | 876 |
7.50-18 | 7.50R18 | 6.00 | 215 | 884 | — | 981 |
7.50-20 | 7.50R20 | 6.00 | 215 | 935 | — | 952 |
8.25-15TR | 8.25R15TR | 6.50 | 236 | 847 | 855 | 865 |
8.25-17 | 8.25R17 | 6.50 | 236 | 898 | 906 | 915 |
8.25-20 | 8.25R20 | 6.50 | 236 | 974 | 982 | 992 |
9.00-15TR | 9.00R15TR | 7.00 | 259 | 891 | 904 | 911 |
9.00-20 | 9.00R20 | 7.00 | 259 | 1 019 | 1 031 | 1 038 |
10.00-15TR | 10.00R15TR | 7.50 | 278 | 927 | 940 | 946 |
10.00-20 | 10.00R20 | 7.50 | 278 | 1 054 | 1 067 | 1 073 |
10.00-22 | 10.50R22 | 7.50 | 278 | 1 104 | 1 118 | 1 123 |
11.00-15TR | 11.00R15TR | 8.00 | 293 | 958 | 972 | 977 |
11.00-20 | 11.00R20 | 8.00 | 293 | 1 085 | 1 099 | 1 104 |
11.00-22 | 11.00R22 | 8.00 | 293 | 1 135 | 1 150 | 1 155 |
11.00-24 | 11.00R24 | 8.00 | 293 | 1 186 | 1 201 | 1 206 |
11.50-20 | 11.50R20 | 8.00 | 296 | 1 085 | 1 099 | 1 104 |
11.50-22 | 11.50R22 | 8.00 | 296 | 1 135 | 1 150 | 1 155 |
12.50-20 | 12.00R20 | 8.50 | 315 | 1 125 | — | 1 146 |
12.50-24 | 12.00R24 | 8.50 | 315 | 1 226 | — | 1 247 |
TABLE 26 | |||||
Tyres for trucks and trailers in highway service at restricted speeds | |||||
DIAGONAL AND RADIAL TYRES MOUNTED ON MULTI-PIECE RIMS | |||||
a Overall tyre widths may exceed the above section widths by 6 %. | |||||
b Tolerance + 6 % of the difference between the above outer diameter and the nominal rim diameters. | |||||
Tyre size designation | Measuring-rim width(inches) | Section width(mm)a | Outer diameter | ||
---|---|---|---|---|---|
Diagonal | Radial | Highway tread(mm)b | Mud and snow(mm)b | ||
13.00-20 | 13.00R20 | 9.00 | 340 | 1 177 | 1 200 |
14.00-20 | 14.00R20 | 10.00 | 375 | 1 241 | 1 266 |
14.00-24 | 14.00R24 | 10.00 | 375 | 1 343 | 1 368 |
TABLE 27 | |||
Tyres for mobile homes in highway service | |||
DIAGONAL | |||
a Overall tyre widths may exceed the above section widths by 8 %. | |||
b Tolerance + 8 % of the difference between the above outer diameter and the nominal rim diameters. | |||
Tyre size designation | Measuring-rim width(inches) | Section width(mm)a | Outer diameter(mm)b |
---|---|---|---|
Tyres mounted on 15o drop-centre rims | |||
7-14.5 MH | 6.00 | 185 | 677 |
8-14.5 MH | 6.00 | 203 | 707 |
9-14.5 MH | 7.00 | 241 | 711 |
Tyres mounted on 5o drop-centre and semi-drop-centre rims | |||
7.00-15 MH | 5.50 | 202 | 752 |
TABLE 28 | ||||
Mining and logging tyres in intermittent highway service | ||||
DIAGONAL | ||||
a Overall tyre widths may exceed the above section widths by 8 %. | ||||
b Tolerance + 6 % of the difference between the above outer diameter and the nominal rim diameters. | ||||
Tyre size designation | Measuring-rim width(inches) | Section width(mm)a | Outer diameter | |
---|---|---|---|---|
Traction tread(mm)b | Extra tread(mm)b | |||
Tyres mounted on 15o drop-centre rims | ||||
7.00-20 ML | 5.50 | 199 | 919 | — |
7.50-20 ML | 6.00 | 215 | 952 | — |
8.25-20 ML | 6.50 | 236 | 992 | — |
9.00-20 ML | 7.00 | 259 | 1 038 | 1 063 |
10.00-20 ML | 7.50 | 278 | 1 073 | 1 099 |
10.00-22 ML | 7.50 | 278 | 1 123 | 1 150 |
10.00-20 ML | 7.50 | 278 | 1 174 | 1 200 |
11.00-20 ML | 8.00 | 293 | 1 104 | 1 131 |
11.00-22 ML | 8.00 | 293 | 1 155 | 1 182 |
11.00-24 ML | 8.00 | 293 | 1 206 | 1 233 |
12.00-20 ML | 8.50 | 315 | 1 146 | 1 173 |
12.00-24 ML | 8.50 | 315 | 1 247 | 1 275 |
13.00-20 ML | 9.00 | 340 | 1 200 | — |
13.00-24 ML | 9.00 | 340 | 1 302 | — |
14.00-20 ML | 10.00 | 375 | 1 266 | — |
14.00-24 ML | 10.00 | 375 | 1 368 | — |
Tyres mounted on full-tapered bead seat rims | ||||
11.00-25 ML | 8.50 | 298 | 1 206 | 1 233 |
12.00-21 ML | 8.50 | 315 | 1 146 | 1 175 |
12.00-25 ML | 8.50 | 315 | 1 247 | 1 275 |
13.00-25 ML | 10.00 | 351 | 1 302 | — |
14.00-21 ML | 10.00 | 375 | 1 266 | — |
14.00-25 ML | 10.00 | 375 | 1 368 | — |
Tyres mounted on 15o drop-centre rims | ||||
9-22.5 ML | 6.75 | 229 | 992 | — |
10-22.5 ML | 7.50 | 254 | 1 038 | — |
11-22.5 ML | 8.25 | 279 | 1 073 | — |
11-24.5 ML | 8.25 | 279 | 1 123 | — |
12-22.5 ML | 9.00 | 300 | 1 104 | — |
Tyres mounted on 15o drop-centre rims | ||||
14-17.5 ML | 10.50 | 349 | 921 | — |
15-19.5 ML | 11.75 | 389 | 1 019 | — |
15-22.5 ML | 11.75 | 389 | 1 095 | — |
16.5-19.5 ML | 13.00 | 425 | 1 068 | — |
16.5-22.5 ML | 13.00 | 425 | 1 144 | — |
18-19.5 ML | 14.00 | 457 | 1 096 | — |
18-22.5 ML | 14.00 | 457 | 1 172 | — |
19.5-19.5 ML | 15.00 | 495 | 1 156 | — |
23-23.5 ML | 17.00 | 584 | 1 320 | — |
Ply-rating | Speed category | ||
---|---|---|---|
L, M, N | P, Q, R, S | T, U, H, V | |
4 | 1,7 | 2,0 | — |
6 | 2,1 | 2,4 | 2,6 |
8 | 2,5 | 2,8 | 3,0 |
Test pressure (bar) | ||||||
T-type temporary use spare tyres: to 4,2 bars. | ||||||
Speed category | Diagonal (bias-ply) tyres | Radial tyres | Bias-belted tyres | |||
---|---|---|---|---|---|---|
Ply-rating | Standard | Reinforced | Standard | |||
4 | 6 | 8 | ||||
L, M, N | 2,3 | 2,7 | 3,0 | 2,4 | — | — |
P, Q, R, S | 2,6 | 3,0 | 3,3 | 2,6 | 3,0 | 2,6 |
T, U, H | 2,8 | 3,2 | 3,5 | 2,8 | 3,2 | 2,8 |
V | 3,0 | 3,4 | 3,7 | 3,0 | — | — |
If a method other than that described in section 2 is used, its equivalence must be demonstrated.
If a method other than that described in section 2 is used, its equivalence must be demonstrated.
LOAD/SPEED TEST PROGRAMME | ||||||
a ‘Special-use’ tyres (see section 2.1.3. of Annex II) should be tested at a speed equal to 85 % of the test-drum speed prescribed above for equivalent normal tyres. | ||||||
Load index | Tyre speed category symbol | Test-drum speed (rev/min)a | Load placed on the wheel as a percentage of the load corresponding to the load index | |||
---|---|---|---|---|---|---|
Radial-ply tyre | Diagonal (bias-ply) tyre | 7 h. | 16 h. | 24 h. | ||
122 or more | F | 100 | 100 | 66 % | 84 % | 101 % |
G | 125 | 100 | ||||
J | 150 | 125 | ||||
K | 175 | 150 | ||||
L | 200 | — | ||||
M | 225 | — | ||||
121 or less | F | 100 | 100 | |||
G | 125 | 125 | ||||
J | 150 | 150 | ||||
K | 175 | 175 | ||||
L | 200 | 175 | 70 % | 88 % | 106 % | |
4 h. | 6 h. | |||||
M | 250 | 200 | 75 % | 97 % | 114 % | |
N | 275 | — | 75 % | 97 % | 114 % | |
P | 300 | — | 75 % | 97 % | 114 % |
RADIAL AND DIAGONAL
(see Annex II, sections 2.30, 2.31 and 6.2.4)
a The load capacity indices refer to single operations (see section 2.28.2 of Annex II). | ||||||||||
b Load variations are not allowed above 160 km/h. For speed category symbols Q and above, the speed category corresponding to the speed category symbol (see section 2.29.3 of Annex II) specifies the maximum speed permitted for the tyre. | ||||||||||
Speed(km/h) | Variation of load capacity (%) | |||||||||
---|---|---|---|---|---|---|---|---|---|---|
All load indices | Load indicesa≥ 122 | Load indicesa≤ 121 | ||||||||
Speed category symbol | Speed category symbol | Speed category symbol | ||||||||
F | G | J | K | L | M | L | M | N | Pb | |
0 | + 150 | + 150 | + 150 | + 150 | + 150 | + 150 | + 110 | + 110 | + 110 | + 110 |
5 | + 110 | + 110 | + 110 | + 110 | + 110 | + 110 | + 90 | + 90 | + 90 | + 90 |
10 | + 80 | + 80 | + 80 | + 80 | + 80 | + 80 | + 75 | + 75 | + 75 | + 75 |
15 | + 65 | + 65 | + 65 | + 65 | + 65 | + 65 | + 60 | + 60 | + 60 | + 60 |
20 | + 50 | + 50 | + 50 | + 50 | + 50 | + 50 | + 50 | + 50 | + 50 | + 50 |
25 | + 35 | + 35 | + 35 | + 35 | + 35 | + 35 | + 42 | + 42 | + 42 | + 42 |
30 | + 25 | + 25 | + 25 | + 25 | + 25 | + 25 | + 35 | + 35 | + 35 | + 35 |
35 | + 19 | + 19 | + 19 | + 19 | + 19 | + 19 | + 29 | + 29 | + 29 | + 29 |
40 | + 15 | + 15 | + 15 | + 15 | + 15 | + 15 | + 25 | + 25 | + 25 | + 25 |
45 | + 13 | + 13 | + 13 | + 13 | + 13 | + 13 | + 22 | + 22 | + 22 | + 22 |
50 | + 12 | + 12 | + 12 | + 12 | + 12 | + 12 | + 20 | + 20 | + 20 | + 20 |
55 | + 11 | + 11 | + 11 | + 11 | + 11 | + 11 | + 17,5 | + 17,5 | + 17,5 | + 17,5 |
60 | + 10 | + 10 | + 10 | + 10 | + 10 | + 10 | + 15,0 | + 15,0 | + 15,0 | + 15,0 |
65 | + 7,5 | + 8,5 | + 8,5 | + 8,5 | + 8,5 | + 8,5 | + 13,5 | + 13,5 | + 13,5 | + 13,5 |
70 | + 5,0 | + 7,0 | + 7,0 | + 7,0 | + 7,0 | + 7,0 | + 12,5 | + 12,5 | + 12,5 | + 12,5 |
75 | + 2,5 | + 5,5 | + 5,5 | + 5,5 | + 5,5 | + 5,5 | + 11,0 | + 11,0 | + 11,0 | + 11,0 |
80 | 0 | + 4,0 | + 4,0 | + 4,0 | + 4,0 | + 4,0 | + 10,0 | + 10,0 | + 10,0 | + 10,0 |
85 | − 3 | + 2,0 | + 3,0 | + 3,0 | + 3,0 | + 3,0 | + 8,5 | + 8,5 | + 8,5 | + 8,5 |
90 | − 6 | 0 | + 2,0 | + 2,0 | + 2,0 | + 2,0 | + 7,5 | + 7,5 | + 7,5 | + 7,5 |
95 | − 10 | − 2,5 | + 1,0 | + 1,0 | + 1,0 | + 1,0 | + 6,5 | + 6,5 | + 6,5 | + 6,5 |
100 | − 15 | − 5 | 0 | 0 | 0 | 0 | + 5,0 | + 5,0 | + 5,0 | + 5,0 |
105 | − 8 | − 2 | 0 | 0 | 0 | + 3,75 | + 3,75 | + 3,75 | + 3,75 | |
110 | − 13 | − 4 | 0 | 0 | 0 | + 2,5 | + 2,5 | + 2,5 | + 2,5 | |
115 | − 7 | − 3 | 0 | 0 | + 1,25 | + 1,25 | + 1,25 | + 1,25 | ||
120 | − 12 | − 7 | 0 | 0 | 0 | 0 | 0 | 0 | ||
125 | 0 | − 2,5 | 0 | 0 | 0 | |||||
130 | 0 | − 5 | 0 | 0 | 0 | |||||
135 | − 7,5 | − 2,5 | 0 | 0 | ||||||
140 | − 10 | − 5 | 0 | 0 | ||||||
145 | − 7,5 | − 2,5 | 0 | |||||||
150 | − 10 | − 5 | 0 | |||||||
155 | − 7,5 | − 2,5 | ||||||||
160 | − 10 | − 5 |
If the holder of an approval completely ceases to manufacture a type of vehicle approved in accordance with this Directive, he must so inform the authority which granted the approval. Upon receiving the relevant communication that authority must inform thereof the other approval authorities by means of a copy of the approval form bearing at the end, in large letters, the signed and dated annotation ‘PRODUCTION DISCONTINUED’.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
a unit consisting of a wheel which conforms to a wheel of a normal unit and a tyre which has principal characteristics (e.g. dimensions, structure) different to the normal tyre;
a unit consisting of a wheel and a tyre both having principal characteristics different to the normal unit and intended to be carried on the vehicle with the tyre inflated to the pressure specified for temporary use;
a unit consisting of a normal wheel and a tyre having principal characteristics different to a normal tyre and intended to be carried on the vehicle with the tyre folded and not inflated;
a unit consisting of a wheel and tyre both having principal characteristics different to a normal unit and intended to be carried on the vehicle with the tyre folded and not inflated;
However, in this case the speed category symbol of the snow tyres must correspond to a speed either greater than the maximum design speed of the vehicle (as declared by the vehicle manufacturer) or not less than 160 km/h (or both).
If, nevertheless, the maximum design speed of the vehicles (as declared by the vehicle manufacturer) is greater than the speed corresponding to the speed category symbol of the snow tyres a maximum speed warning label, specifying the maximum speed capability of the snow tyres, must be displayed inside the vehicle in a prominent position readily visible to the driver.
This annex applies to the EC type-approval of tyres, as components, in respect of tyre/road noise emissions.
For the purposes of this Annex, the definitions of Annex II shall apply, except for the definition under section 2.1., which shall read as follows:
means, in relation to type-approval pursuant to this Annex (tyre/road noise emission), a range of tyres consisting of a list of tyre size designations (see section 2.17 in Annex II), brand names, trade marks and trade descriptions which do not differ in such essential characteristics as:
the manufacturer's name
the tyre classification (see section 2.4. of this Annex)
the tyre structure (see section 2.1.4. of Annex II)
the category of use (see section 2.1.3. of Annex II)
for class C1 tyres. Reinforced or Extra Load
the tread pattern (see 2.3 of Information Document, Annex I, Appendix 3).
The effect of changes in minor details of tyre tread and construction on the tyre/road noise emission will be determined during checks on the conformity of production. U.K.
In addition, the following definitions shall also apply:
means the identification for the tyre as provided by the tyre manufacturer. The brand name may be the same as the manufacturer and the trade description may coincide with the trade mark.
means the noise arising from the contact between tyres in motion and the road surface.
class C1 tyres | passenger car tyres (see section 2.32. of Annex II); |
class C2 tyres | commercial vehicle tyres (see section 2.33. of Annex II) with load capacity index in single formation ≤ 121 and speed category symbol ≥ ‘ N ’ (see section 2.29.3. of Annex II); |
class C3 tyres | commercial vehicle tyres (see section 2.33. of Annex II) with load capacity index in single formation ≤ 121 and speed category symbol ≤ ‘ M ’ (see section 2.29.3. of Annex II) or commercial vehicle tyres (see section 2.33. of Annex II) with load capacity index in single formation ≥ 122. |
the manufacturer's name or trade mark; the brand name, the trade description or the trade mark.
A set of four tyres bearing the same tyre size designation and tread pattern that is representative of the range of tyres, shall be submitted to a tyre/road noise emission level test to be carried out as specified in Appendix 1.
Class C1 tyres, with reference to the nominal section width (see Annex II, section 2.17.1.1.) of the tyre that has been tested:
a Limit values in column A shall apply until 30 June 2007 ; Limit values in column B shall apply as from 1 July 2007 . | ||||
b Limit values in column A shall apply until 30 June 2008 ; Limit values in column B shall apply as from 1 July 2008 . | ||||
c Limit values in column A shall apply until 30 June 2009 ; Limit values in column B shall apply as from 1 July 2009 . | ||||
d Indicative figures only. Definitive figures will depend on amendment of the Directive following the report required in Article 3(2) of Directive 2001/43/EC. | ||||
e Limit values for column C will result from the amendment of the Directive following the report required in Article 3(2) of Directive 2001/43/EC. | ||||
Limit values in dB(A) | ||||
---|---|---|---|---|
Tyre Class | Nominal section width (mm) | A | B d | C d e |
C1a | ≤ 145 | 72 a | 71 a | 70 |
C1b | > 145 ≤ 165 | 73 a | 72 a | 71 |
C1c | > 165 ≤ 185 | 74 a | 73 a | 72 |
C1d | > 185 ≤ 215 | 75 b | 74 b | 74 |
C1e | > 215 | 76 c | 75 c | 75 |
For reinforced (or Extra Load) tyres (see Annex II, section 3.1.8.), the limit values in section 4.2.1. shall be increased by 1 dB(A)
For tyres classified in category of use ‘ Special ’ , (see Annex II, section 2.1.3.), the limit values in section 4.2.1. shall be increased by 2 dB(A).
Class C2 tyres with reference to the category of use (see Annex II, section 2.1.3.) of the range of tyres:
Category of use | Limit value expressed in dB(A) |
---|---|
Normal | 75 |
Snow | 77 |
Special | 78 |
Class C3 tyres, with reference to the category of use (see Annex II, section 2.1.3.) of the range of tyres:
Category of use | Limit value expressed in dB(A) |
---|---|
Normal | 76 |
Snow | 78 |
Special | 79 |
The presented method contains specifications on measuring instruments, measurement conditions and the measurement method, in order to obtain the noise level of a set of tyres mounted on a test vehicle rolling at high speed on a specified road surface. The maximum sound pressure level is to be recorded, when the test vehicle is coasting, by remote-field microphones; the final result of a reference speed is obtained from a linear regression analysis. Such test results cannot be related to tyre noise measured during acceleration under power or deceleration during braking.
The sound level meter or the equivalent measuring system, including the windscreen recommended by the manufacturer, shall at least meet the requirements of Type 1 instruments in accordance with IEC 60651, second edition.
The measurements shall be made using the frequency weighting A, and the time weighting F.
When using a system that includes a periodic monitoring of the A-weighted sound level, a reading should be made at a time interval not greater than 30 ms.
At the beginning and at the end of every measurement session, the entire measurement system shall be checked by means of a sound calibrator that fulfils the requirements for sound calibrators of at least precision Class 1 according to IEC 942:1988. Without any further adjustment the difference between the readings of two consecutive checks shall be less than or equal to IEC 942:1988. Without any further adjustment the difference between the readings of two consecutive checks shall be less than or equal to 0,5 dB. If this value is exceeded, the results of the measurements obtained after the previous satisfactory check shall be discarded.
The compliance of the sound calibration device with the requirements of IEC 60942:1988 shall be verified once a year and the compliance of the instrumentation system with the requirements of IEC 60651:1979/A1:1993, second edition, shall be verified at least every two years by a laboratory which is authorised to perform calibrations traceable to the appropriate standards.
The microphone (or microphones) must be located at a distance of 7,5 m ± 0,05 m from track reference line CC 1 ( figure 1 ) and 1,2 m ± 0,02 m above the ground. Its axis of maximum sensitivity must be horizontal and perpendicular to the path of the vehicle (line CC 1 ).
The vehicle speed shall be measured with instruments with an accuracy of ± 1 km/h or better when the front end of the vehicle has reached line PP′ ( figure 1 ).
Measurements of air as well as test surface temperature are mandatory. The temperature measuring devices shall be accurate within ± 1 o C.
The temperature sensor is to be positioned in an unobstructed location close to the microphone in such a way that it is exposed to the airflow and protected from direct solar radiation. The latter may be achieved by any shading screen or similar device. The sensor should be positioned at a height of 1,2 m ± 0,1 m above the test surface level in order to minimise the influence of the test surface thermal radiation at low airflows.
The temperature sensor is to be positioned in a location where the temperature measured is representative of the temperature in the wheel tracks, without interfering with the sound measurement.
If an instrument with a contact temperature sensor is used, heat-conductive paste shall be applied between the surface and the sensor to ensure adequate thermal contact.
If a radiation thermometer (pyrometer) is used, the height should be chosen to ensure that a measuring spot with a diameter of ≥ 0,1 m is covered.
The device must be capable of measuring the wind speed with a tolerance of ± 1 m/s. The wind shall be measured at microphone height. The wind direction with reference to the driving direction shall be recorded.
The test site must consist of a central section surrounded by a substantially flat test area. The measuring section must be level; the test surface must be dry and clean for all measurements. The test surface shall not be artificially cooled during or prior to the testing.
The test track must be such that the conditions of a free sound field between the sound source and the microphone are attained to within 1 dB(A). These conditions shall be deemed to be met if there are no large sound reflecting objects such as fences, rocks, bridges or buildings within 50 m of the centre of the measuring section. The surface of the test track and the dimensions of the test site shall be in accordance with Appendix 2 of this Annex.
A central part of at least 10 m radius shall be free of powdery snow, tall grass, loose soil, cinders or the like. There must be no obstacle which could affect the sound field within the vicinity of the microphone and no persons shall stand between the microphone and the sound source. The operator carrying out the measurements and any observers attending the measurements must position themselves so as not to affect the readings of the measuring instruments.
Measurements shall not be made under poor atmospheric conditions. It must be ensured that the results are not affected by gusts of wind. Testing shall not be performed if the wind speed at the microphone height exceeds 5 m/s.
Measurements shall not be made if the air temperature is below 5 o C or above 40 o C or the test surface temperature is below 5 o C or above 50 o C.
The background sound level (including any wind noise) shall be at least 10 dB(A) less than the measured tyre-road sound emission. A suitable windscreen may be fitted to the microphone provided that account is taken of its effect on the sensitivity and directional characteristics of the microphone.
Any measurement affected by a sound peak which appears to be unrelated to the characteristics of the general sound level of tyres shall be ignored.
The test vehicle shall be a motor vehicle and be fitted with four single tyres on just two axles.
The vehicle must be loaded such as to comply with the test tyre loads as specified in section 2.5.2. below.
The wheelbase between the two axles fitted with the test tyres shall for Class C1 be less than 3,50 m and for Class C2 and Class C3 tyres be less than 5 m.
To ensure that tyre noise is not significantly affected by the test vehicle design the following requirements and recommendations are given.
Requirements:
Spray suppression flaps or other extra device to suppress spray shall not be fitted.
Addition or retention of elements in the immediate vicinity of the rims and tyres, which may screen the emitted sound, is not permitted.
Wheel alignment (toe in, camber and castor) shall be in full accordance with the vehicle manufacturer's recommendations.
Additional sound absorbing material may not be mounted in the wheel housings or under the underbody.
Suspension shall be in such a condition that it does not result in an abnormal reduction in ground clearance when the vehicle is loaded in accordance with the testing requirement. If available, body level regulation systems shall be adjusted to give a ground clearance during testing which is normal for unladen condition.
Recommendations to avoid parasitic sound:
Removal or modification of components on the vehicle that any contribute to the background sound of the vehicle is recommended. Any removals or modifications shall be recorded in the test report.
During testing it should be ascertained that brakes are not poorly released, causing brake noise.
It should be ascertained that electric cooling fans are not operating.
Windows and sliding roof of the vehicle shall be closed during testing.
Four identical tyres of the same type and range must be fitted to the test vehicle. In the case of tyres with a load capacity index in excess of 121 and without any dual fitting indication, two of these tyres of the same type and range must be fitted to the rear axle of the test vehicle; the front axle must be fitted with tyres of a size suitable for the axle load and planed down to the minimum depth in order to minimise the influence of tyre/road contact noise while maintaining a sufficient level of safety. Winter tyres that in certain Member States may be equipped with studs intended to enhance friction shall be tested without this equipment. Tyres with special fitting requirements shall be tested in accordance with these requirements (e.g. rotation direction). The tyres must have full tread depth before being run-in.
Tyres are to be tested on rims permitted by the tyre manufacturer.
The test load Q t for each tyre on the test vehicle shall be 50 % to 90 % of the reference load Q r , but the average test load Q t,avr of all tyres shall be 75 % ± 5 % of the reference load Q r .
For all tyres the reference load Q r corresponds to the maximum mass associated with the load capacity index of the tyre. In the case where the load capacity index is constituted by two numbers divided by slash (/), reference shall be made to the first number.
Each tyre fitted on the test vehicle shall have a test pressure P t not higher than the reference pressure P r and within the interval:
where P r is the pressure corresponding to the pressure index marked on the sidewall.
For Class C1 the reference pressure is P r = 250 kPa for ‘standard’ tyres and 290 kPa for ‘reinforced’ tyres, the minimum test pressure shall be P t = 150 kPa.
The tyres should be ‘ run-in ’ prior to testing to remove compound nodules or other tyre pattern characteristics resulting from the moulding process. This will normally require the equivalent of about 100 km of normal use on the road.
The tyres fitted to the test vehicle shall rotate in the same direction as when they were run-in.
Prior to testing tyres shall be warmed up by running under test conditions.
For all measurements the vehicle must be driven in a straight line over the measuring section (AA′ to BB′) in such a way that the median longitudinal plane of the vehicle is as close as possible to the line CC′.
When the front end of the test vehicle has reached the line AA′, the vehicle's driver must have put the gear selector on neutral position and switched off the engine. If abnormal noise (e.g. ventilator, self-ignition) is emitted by the test vehicle during the measurement, the test must be repeated.
The maximum sound level expressed in A-weighted decibels (dB(A)) shall be measured to the first decimal place as the vehicle is coasting between lines AA′ and BB′ ( figure 1 — front end of the vehicle on line AA′, rear end of the vehicle on line BB'). This value will constitute the result of the measurement.
At least four measurements shall be made on each side of the test vehicle at test speeds lower than the reference speed specified in paragraph 4.1. and at least four measurements at test speeds higher than the reference speed. The speeds shall be approximately equally spaced over the speed range specified in paragraph 3.3.
The test vehicle speeds shall be within the range:
from 70 km/h to 90 km/h for Class C1 and Class C2 tyres;
from 60 km/h to 80 km/h for Class C3 tyres.
The measurement shall be invalid if an abnormal discrepancy between the maximum value and the other values is recorded.
Reference speed V ref used to determine the final result will be:
80 km/h for Class C1 and Class C2 tyres;
70 km/h for Class C3 tyres.
The (not temperature corrected) tyre-road noise level L R in dB(A) is determined by a regression analysis according to:
where:
is the mean value of the noise levels L i , measured in dB(A):
n is the measurement number (n ≥ 16),
With
a is the slope of the regression line in dB(A):
For Class C2 tyres, the final result shall be normalised to a test surface reference temperature h ref by applying a temperature correction, according to the following:
where θ is the measured test surface temperature,
For Class C1 tyres, the coefficient K is – 0,03 dB(A)/ o C when θ > θ ref and K is – 0,06 dB(A)/ o C when θ < θ ref .
For Class C2 tyres, the coefficient K is – 0,02 dB(A)/ o C
If the measured test surface temperature does not change by more than 5 o C within all measurements necessary for the determination of the sound level of one set of tyres, the temperature correction may be made only on the final reported tyre-road sound level as indicated above, utilizing the arithmetic mean value of the measured temperatures. Otherwise each measured sound level L i shall be corrected, utilizing the temperature at the time of the sound recording.
There will be no temperature correction for Class C3 tyres.
The test report shall include the following information:
meteorological conditions inclusive of air and test surface temperature for each test run,
date and method of check on compliance of the test surface with ISO 10844:1994,
test rim width,
tyre data: manufacturer, brand name, trade name, size, load index, reference pressure,
test vehicle description and wheelbase,
type test load Q t in N and in per cent of the reference load Q r for each test tyre, average test load Q t,avr in N and in per cent of the reference load Q r ,
cold inflation pressure in kPa for each test tyre,
test speeds when the vehicle passed line PP′,
maximum A-weighted sound levels for each test run and each microphone,
the test result L R : A-weighted sound level in decibel at reference speed, corrected for temperature (if applicable), rounded down to the nearest lower whole value.
regression line slope.]
This annex describes the specifications relating to the physical characteristics and the laying of the test track. These specifications based on a special standard (7) describe the required physical characteristics as well as the test methods for these characteristics.
A surface is considered to conform to this standard provided that the texture and voids content or sound absorption coefficient have been measured and found to fulfil all the requirements of sections 2.1. to 2.4. below and provided that the design requirements (section 3.2.) have been met.
The residual voids content (VC) of the test track paving mixture shall not exceed 8 %. For the measurement procedure, see section 4.1.
If the surface fails to comply with the residual voids content requirement, the surface is acceptable only if its sound absorption coefficient α ≤ 0,10. For the measurement procedure, see section 4.2. The requirement of sections 2.1. and 2.2. is also met if only sound absorption has been measured and found to be α ≤ 0.10.
The most relevant characteristic is the sound absorption, although the residual voids content is more familiar among road constructors. However, sound absorption needs to be measured only if the surface fails to comply with the voids requirement. This is justified because the residual voids content has relatively large uncertainties in terms of both measurements and relevance and some surfaces may therefore erroneously be rejected when based only on the voids measurement. U.K.
The texture depth (TD) measured according to the volumetric method (see section 4.3. below) shall be:
Every practical effort shall be taken to ensure that the surface is made to be as homogeneous as possible within the test area. This includes the texture and voids content, but it should also be observed that if the rolling process results in more effective rolling at some places than others, the texture may be different and unevenness causing bumps may also occur.
In order to check whether the surface continues to conform to the texture and voids content or sound absorption requirements stipulated in this Annex, periodic testing of the surface shall be carried out at the following intervals:
For residual voids content (VC) or sound absorption (α):
when the surface is new;
if the surface meets the requirements when new, no further periodical testing is required. If it does not meet the requirement when it is new, it may do so later because surfaces tend to become clogged and compacted with time.
For texture depth (TD):
when the surface is new;
when the noise testing starts ( NB : not before four weeks after laying);
then every twelve months.
When designing the test track layout it is important to ensure that, as a minimum requirement, the area traversed by the vehicles running through the test strip is covered with the specified test material with suitable margins for safe and practical driving. This will require that the width of the track is at least 3 m and the length of the track extends beyond lines AA and BB by at least 10 m at either end. Figure 1 shows a plan of a suitable test site and indicates the minimum area which shall be machine laid and machine compacted with the specified test surface material. According to Annex 5, Appendix 1, section 3.2., measurements have to be made on each side of the vehicle. This can be made either by measuring with two microphone locations (one on each side of the track) and driving in one direction, or measuring with a microphone only on one side of the track but driving the vehicle in two directions. If the latter method is used, then there are no surface requirements on that side of the track where there is no microphone.
The test surface shall meet four design requirements:
It shall be a dense asphaltic concrete.
The maximum chipping size shall be 8 mm (tolerances allow from 6,3 mm to 10 mm).
The thickness of the wearing course shall be ≥ 30 mm.
The binder shall be a straight penetration grade bitumen without modification.
As a guide to the surface constructor, an aggregate grading curve which will give desired characteristics is shown in Figure 2. In addition, Table 1 gives some guidelines in order to obtain the desired texture and durability. The grading curve fits the following formula:
where:
=
square mesh sieve size, in mm
=
8 mm for the mean curve
10 mm for the lower tolerance curve
6,3 mm for the upper tolerance curve
In addition to the above, the following recommendations are made:
The sand fraction (0,063 mm < square mesh sieve size < 2 mm) shall include no more than 55 % natural sand and at least 45 % crushed sand.
The base and sub-base shall ensure a good stability and evenness, according to best road construction practice.
The chippings shall be crushed (100 % crushed faces) and of a material with a high resistance to crushing.
The chippings used in the mix shall be washed.
No extra chippings shall be added onto the surface.
The binder hardness expressed as PEN value shall be 40-60, 60-80 or even 80-100 depending on the climatic conditions of the country. The rule is that as hard a binder as possible shall be used, provided this is consistent with common practice.
The temperature of the mix before rolling shall be chosen so as to achieve by subsequent rolling the required voids content. In order to increase the probability of satisfying the specifications of sections 2.1. to 2.4. above, the compactness shall be studied not only by an appropriate choice of mixing temperature, but also by an appropriate number of passings and by the choice of compacting vehicle.
Table 1 | |||
Design guidelines | |||
Target values | Tolerances | ||
---|---|---|---|
By total mass of mix | By mass of the aggregate | ||
Mass of stones, square mesh sieve (SM) > 2 mm | 47,6 % | 50,5 % | ± 5 |
Mass of sand 0,063 < SM < 2 mm | 38,0 % | 40,2 % | ± 5 |
Mass of filler SM <0,063 mm | 8,8 % | 9,3 % | ± 2 |
Mass of binder (bitumen) | 5,8 % | N.A. | ± 0,5 |
Max. chipping size | 8 mm | 6,3 – 10 | |
Binder hardness | (see para. 3.2.2. (f)) | ||
Polished stone value (PSV) | > 50 | ||
Compactness, relative to Marshall compactness | 98 % |
For the purpose of this measurement, cores have to be taken from the track in at least four different positions which are equally distributed in the test area between lines AA and BB (see figure 1). In order to avoid non-homogeneity and unevenness in the wheel tracks, cores should not be taken in wheel tracks themselves, but close to them. Two cores (minimum) should be taken close to the wheel tracks and one core (minimum) should be taken approximately midway between the wheel tracks and each microphone location.
If there is a suspicion that the condition of homogeneity is not met (see section 2.4.), cores shall be taken from more locations within the test area.
The residual voids content has to be determined for each core, then the average value from all cores shall be calculated and compared with the requirement of section 2.1. In addition, no single core shall have a voids value which is higher than 10 %.
The test surface constructor is reminded of the problem which may arise when the test area is heated by pipes or electrical wires and cores must be taken from this area. Such installations must be carefully planned with respect to future core drilling locations. It is recommended to leave a few locations of size approximately 200 mm × 300 mm where there are no wires/pipes or where the latter are located deep enough in order not to be damaged by cores taken from the surface layer.
The sound absorption coefficient (normal incidence) shall be measured by the impedance tube method using the procedure specified in ISO 10534-1: ‘Acoustics — Determination of sound absorption coefficient and impedance by a tube method’(8) .
Regarding test specimens, the same requirements shall be followed as regarding the residual voids content (see section 4.1). The sound absorption shall be measured in the range between 400 Hz and 800 Hz and in the range between 800 Hz and 1 600 Hz (at least at the centre frequencies of third octave bands) and the maximum values shall be identified for both of these frequency ranges. Then these values, for all test cores, shall be averaged to constitute the final result.
For the purpose of this standard, texture depth measurements shall be made on at least 10 positions evenly spaced along the wheel tracks of the test strip and the average value taken to compare with the specified minimum texture depth. See Standard ISO 10844:1994 for description of the procedure.
In common with any other surfaces, it is expected that the tyre-road noise level measured on the test surface may increase slightly during the first 6 — 12 months after construction.
The surface will achieve its required characteristics not earlier than four weeks after construction. The influence of age on the noise from trucks is generally less than that from cars.
Stability over time is determined mainly by polishing and compaction by vehicles driving on the surface. It shall be periodically checked as stated in section 2.5.
Loose debris or dust which could significantly reduce the effective texture depth must be removed from the surface. In countries with winter climates, salt is sometimes used for de-icing. Salt may alter the surface temporarily or even permanently in such a way as to increase noise and is therefore not recommended.
If it is necessary to repave the test track, it is usually unnecessary to repave more than the test strip (of 3 m width in figure 1) where vehicles are driving, provided the test area outside the strip met the requirement of residual voids content or sound absorption when it was measured.
The following data shall be given in a document describing the test surface:
The location of the test track.
Type of binder, binder hardness, type of aggregate, maximum theoretical density of the concrete (DR), thickness of the wearing course and grading curve determined from cores from the test track.
Method of compaction (e.g. type of roller, roller mass, number of passes).
Temperature of the mix, temperature of the ambient air and wind speed during laying of the surface.
Date when the surface was laid and contractor.
All or at least the latest test result, including:
the residual voids content of each core;
the locations in the test area from where the cores for voids measurements have been taken;
the sound absorption coefficient of each core (if measured). Specify the results both for each core and each frequency range as well as the overall average;
the locations in the test area from where the cores for absorption measurement have been taken;
texture depth, including the number of tests and standard deviation;
the institution responsible for tests according to sections 6.1.6.1. and 6.1.6.2. and the type of equipment used;
date of the test(s) and date when the cores were taken from the test track.
In the document describing the vehicle noise test(s) it shall be stated whether all the requirements of this standard were fulfilled or not. Reference shall be made to a document according to section 6.1. describing the results which verify this.]
See explanatory figure, Appendix 1.
See explanatory figure, Appendix 1.
See explanatory figure, Appendix 1.
Equivalence factor from inches to mm is 25,4.
In the case of passenger car tyres intended for vehicles designed for a maximum speed greater than 240 km/h (Z rated tyres), until uniform test procedures have been agreed the manufacturer of the tyre must satisfy the technical service that his test procedure and results are acceptable.
In the case of commercial vehicle tyres intended for vehicles designed for a maximum speed greater than 150 km/h, until uniform test procedures have been agreed the manufacturer of the tyre must satisfy the technical service that his test procedure and results are acceptable.
[F3ISO 10844:1994 If a different test surface is defined by ISO, in the future, the reference standard will be amended accordingly.
To be published.]